Suspension assembly for tandem axle trucks



Jan. 5, 1943- E. M. CARMICHIEL. ET AL 9 3 SUSPENSION ASSEMBLY FOR TANDEM AXLE THU Filed Nov. 16, 1939 2 Sheets-Sheet l Jan. 5, 1943. E. M. CARMICHIEL ETAL' 2,307,388 SUSPENSION ASSEMBLY FOR TANDEM AXLE TRU 2 Sheets-Sheet 2 Filed Nov. 16, 1959 Patented Jan. 5, 1943 UNITED STATES Parent SUSPENSION ASSEMBLY FOR AXLE TRUCKS TANDEM Edward M. Carmichiel and John P. Stein, Seattle,

Wash.; said Carmichiel Lyt'el, Seattle, Wash.

assignor to Robert B.

Application November 16, 1933, Serial No. 304,672v Claims. (Cl. 280-124) the compensating wrist movement, permit individual springing of the axle ends.

In accomplishing said ends, the invention consuspension arrangement according to the present invention.

Fig. 2 is a fragmentary transverse vertical section taken to an enlarged scale on line 2-2 of Fig. 1;

Fig. 3 is a fragmentary longitudinal vertical section on line 33 of Fig. 2.

Referring to the drawings-representing fragbility of cramping even under utmost conditions of reactive stress. It is also desirable that the lower of the two trunnion rods be and independent of the corre-- sponding co-axial trunnion at the opposite side of the vehicle.

It will, it is believed, be apparent that we have embodiment scription.

or by reference thereto in the de- 2 2,307,388 ing said axles for revoluble movement therein, axle, an axle housing receiving said axle for revand the vehicl main frame; uspen ion mechaoluble movement therein, and the vehicle main nism at each side of the vehicle comprising a pair frame: suspension mechamsm at each side of the of vertically spaced and longitudinally extending vehicle comprising a pair of vertically spaced and stress beams respectively fulcrumed between their longitudinally extending stress beams independends to the frame for rocker movement about a ently fulcrumed to the frame for rocker movetransverse horizontal axis; hangers for the axle ment about transverse horizontal axes; a hanger housings positioned in the vertical plane of the for the axle housing extending between and constress beams and providing means at the upper nected for knuckle movement to the free ends of and lower ends functioning to engage the ends or h s r ss b ms nd, b w n s d n i n the stress beams, said hangers being of box conproviding a chamber extending in a transverse struction providing a central chamber extending dire tion through the hanger and having s ceilin a transverse direction through the same and ins and floor surfaces acti in comp m nt to said chamber being characterized in that the p o ce a cylindrioal Wrist bearing described ceiling and floor surfaces define cylinder segments about a horizontal axis paralleling, or approxiproduced about a common horizontal axis tramately paralleling, the longitudinal median line verging the related axle at right angles to the of the vehicle; and a block element receiving the latter; center-bored blocks receiving the axle axle housing therethrough, having said axle housings therethrough and themselves finding a housing fixedagainst axial movement in relation wrist bearing in the cylinders of the hangers, thereto, and itself finding a wrist bearing in said said blocks being provided with longitudinal bores chamber of the han in the opposite side walls; and removable dowels e. An axle suspension ording to claim 3, fitting in said side-wall bores and having funcsaid fixing of the axle housing to the block eletional connection with the axle housings for lockment being prov by removable dowels carried ing the housings against axial movement in rela- 25 by the latter nd u a y eng ging he tion to the related blocks. former.

2. In a tandem rear axle vehicle, i combina- 5. In vehicle construction, in combination with tion with the tandem rear axles, housings receiva vehicle axle, a hou in therefor, and a vehicle ing said axles for revoluble movement therein, main r m a r m -supp d a r pr s tand the vehicle main frame: suspension mechato ing a chamber open at the front and sides only nism at each side of the vehicle comprising a pair and having its ceiling and floor surfaces defining of vertically spaced and longitudinally extending cylinder e ments produced about a common stress beams respectively fulcrumed between their horizontal axis parallelin approximately P ends to the frame for rocker movement about a alleling, the longitudinal median line of the vetransverse horizontal axis; hangers for the axle hicle; a block finding a wrist bearing in the housings extending between and connected for cylinder of the hanger, transversely center-bored knuckle movement to the related ends of the for the reception of the axle housing, and having stress beams, said hangers being of box constructhe walls at each side of said center-bore tion providing a central chamber extending in a through-bored on an axis coinciding with that of transverse direction through the same and said the cylinder segments; removable stub-dowels chamber being characterized in that the ceiling fitting in said last-named wall bores to lie at and floor surfaces complement one another to deopposite sides of the axle housing and functionfine a wrist bearing produced about a horizontal ally engaging said housing for locking the latter axis paralleling, or appro imately paralleling, the against axial movement in relation to the block; longitudinal median line of the vehicle; and and a removable closure plate forming a front block elements functionally fixed against relative wall for the block-receiving chamber for securing axial movement to the axle housings and received said block within the hanger.

for wrist movement in said wrist bearings of the JOHN P. STE

hangers.

3. In a vehicle, in combination with the rear 59 EDWARD M. CARMICHIEL. 

